WO2004047501A1 - Auto switching circuit founded on illuminance - Google Patents

Auto switching circuit founded on illuminance Download PDF

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Publication number
WO2004047501A1
WO2004047501A1 PCT/KR2003/002508 KR0302508W WO2004047501A1 WO 2004047501 A1 WO2004047501 A1 WO 2004047501A1 KR 0302508 W KR0302508 W KR 0302508W WO 2004047501 A1 WO2004047501 A1 WO 2004047501A1
Authority
WO
WIPO (PCT)
Prior art keywords
unit
current
illuminance
switching circuit
power
Prior art date
Application number
PCT/KR2003/002508
Other languages
French (fr)
Inventor
Jin-Young Choi
Original Assignee
Jin-Young Choi
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Jin-Young Choi filed Critical Jin-Young Choi
Priority to AU2003282411A priority Critical patent/AU2003282411A1/en
Publication of WO2004047501A1 publication Critical patent/WO2004047501A1/en

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
    • H03K17/941—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated using an optical detector
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/10—Controlling the light source
    • H05B47/105—Controlling the light source in response to determined parameters
    • H05B47/11—Controlling the light source in response to determined parameters by determining the brightness or colour temperature of ambient light
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K2217/00—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00
    • H03K2217/94—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00 characterised by the way in which the control signal is generated
    • H03K2217/941—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00 characterised by the way in which the control signal is generated using an optical detector
    • H03K2217/94102—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00 characterised by the way in which the control signal is generated using an optical detector characterised by the type of activation
    • H03K2217/94106—Passive activation of light sensor, e.g. by ambient light
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
    • Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection

Definitions

  • the present invention relates, in general, to an automatic switching circuit using light and, more particularly, to an automatic power switching circuit using light, which automatically switches off or on power supplied from an outlet or a power bar, which performs an intermediating function of supplying electricity to electrical and electronic appliances, depending on indoor illuminance.
  • switches installed on the respective appliances are manipulated or a switch installed on a power bar is manipulated, thus integrally switching off the power of the appliances connected to the power bar.
  • the plugs of the appliances are removed from the outlets or the power bar to stop the use of appliances.
  • an object of the present invention is to provide an automatic power switching circuit using light, which is installed in an outlet or a power bar for performing an intermediating function of supplying power to various electrical and electronic appliances, so as to improve user convenience, save electric energy and prevent the occurrence of fire when the electrical and electronic appliances are used indoors, so that, if indoor illumination is high, a current is allowed to flow through the outlet or power bar, while if the indoor illumination is low, a current flowing through the outlet or power bar is switched off, thus automatically switching off power without a user personally manipulating switches of the appliances or removing plugs thereof.
  • the present invention provides an automatic power switching circuit using light, comprising an illuminance detecting unit for detecting illuminance according to the brightness of light, a comparing unit for comparing an output voltage obtained by an illumination detection signal output from the illumination detecting unit with a reference voltage, an amplifying unit for comparing the illumination detection signal input to a comparator of the comparing unit with the reference voltage to operate a relay and then generating a detection signal used to operate a gate of a thyristor device, a switching unit for controlling bidirectional currents of an input voltage and a supplied voltage, and a rectifying unit for converting an AC current input from a power supply into a DC current and supplying the DC current to the relay.
  • FIG. 1 is a circuit diagram of an automatic power switching circuit using light according to the present invention.
  • FIG. 1 is a view showing the construction of an automatic power switching circuit using light according to the present invention.
  • the automatic power switching circuit includes an illuminance detecting unit 10, a comparing unit 20, an amplifying unit 30, a switching unit 40, a rectifying circuit unit 50, and electrical parts including diodes, condensers and resistors supporting the above-described components by allowing a current to flow only in a specific direction.
  • the illuminance detecting unit 10 includes a light receiving element and a resistor to detect illuminance according to the brightness of light.
  • the comparing unit 20 is constructed so that, if the brightness of light decreases to a predetermined illuminance or below, a comparator compares an input voltage and a preset reference voltage to each other and outputs a signal only when the input voltage is higher than the reference voltage.
  • the reference voltage of the comparator is adjusted to be varied with resistance values.
  • the amplifying unit 30 If the signal output from the illuminance detecting unit 10 is input to the comparator, the amplifying unit 30 generates a signal according to the result obtained by comparing the signal output from the illuminance detecting unit 10 with the reference voltage and then supports the operation of the switching unit 40.
  • the switching unit 40 functions to control bidirectional currents of both an input voltage received from the illuminance detecting unit 10 through the amplifying unit 30, and a voltage supplied from a power supply, and is comprised of a triac, resistors and a diode bridge.
  • the rectifying circuit unit 50 rectifies an Alternating Current (AC) current using both a transformer and a diode bridge to convert the AC current into a Direct Current (DC) current because a current received from the power supply is the AC current, and uses the rectified current as power used to drive a relay.
  • AC Alternating Current
  • DC Direct Current
  • a current from the power supply is input to the rectifying circuit unit 50 comprised of a transformer TI and a diode bridge BG1, and then rectified from an AC current to a DC current.
  • the DC current is used as operating power of a relay RYl through a resistor Rl and a condenser CI .
  • ZD1 functions to prevent a reverse current from flowing into the rectifying circuit unit.
  • a part of the input current is input to a triac Ql and a resistor R4 connected in parallel with each other in the switching unit 40, passes through a diode bridge BG2, and is then output to a variable resistor NR1 through to a resistor Rl 1 and a gate of a thyristor device Q3.
  • Q3 is connected to a relay RYl to function to connect or disconnect the relay
  • the thyristor device Q3 uses characteristics that a current consistently flows only in the direction of the resistor R10 in the switching unit 40 unless a voltage of an anode of the thyristor device Q3 becomes
  • the current input through an input terminal having passed through the thyristor device Q3 and the variable resistor VR1, is input to the comparing unit which obtains a voltage difference between two input signals so as to compare the input current with a current input from the light receiving element Cds of the illuminance detecting unit 10.
  • the comparator U1B outputs the current input from the illuminance detecting unit to the amplifying unit 30 through a resistor R9 connected in parallel with a diode D2 and a condenser C3.
  • the gate of the thyristor device Q3 is disconnected from the relay due to a current amplified by the amplifying unit including an operational amplifier U1A, so that the current from the power supply terminal, which has passed through a transistor Q2, the relay RYl and a zener diode ZD2 and switched through resistors R2 and R2, is prevented from being output to an output terminal, thus switching off the automatic power switching circuit using light.
  • a current input through the input terminal to the switching unit passes through the resistor Rl 1, the thyristor device Q3, the resistor R10 and the variable resistor VR1, and is then input to the comparing unit.
  • a current input to the light receiving element of the illuminance detecting unit is relatively low, because the indoor illuminance is low, the brightness of light is lowest and the resistance becomes largest.
  • the present invention provides an automatic power switching circuit using light, which compares a current input through an input terminal with a current detected by an illuminance detecting unit, so that technology opposite to conventional technology of switching on power when the illuminance is low and switching off the power when the illuminance is high is implemented, thus enabling a user utilizing various electrical appliances indoors to save electricity for the appliances consuming power when the user does not manipulate a switch or even when the user manipulates the switch, and thus contributing the prevention of fires.

Landscapes

  • Circuit Arrangement For Electric Light Sources In General (AREA)

Abstract

The present invention relates to an automatic power switching circuit using light. The automatic power switching circuit includes an illuminance detecting unit for detecting illuminance according to the indoor brightness, a comparing unit for comparing a current output from the illuminance detecting unit with a current output through an input terminal, an amplifying unit for amplifying a current output from the comparing unit, a switching unit for controlling bidirectional currents output from a power supply terminal and the amplifying unit, and a rectifying circuit unit for converting an AC current supplied from the power supply into a DC current. The present invention is advantageous in that it switches off the power of outlets or power bars so as not to provide electricity to electrical and electronic appliances when indoor illuminance becomes low, and switches on the power thereof when the indoor illuminance becomes high.

Description

AUTO SWITCHING CIRCUIT FOUNDED ON ILLUMINANCE
Technical Field
The present invention relates, in general, to an automatic switching circuit using light and, more particularly, to an automatic power switching circuit using light, which automatically switches off or on power supplied from an outlet or a power bar, which performs an intermediating function of supplying electricity to electrical and electronic appliances, depending on indoor illuminance.
Background Art
Generally, most electrical and electronic appliances used indoors are used according to purposes by inserting the plugs of the respective appliances into outlets embedded in a wall surface or power bars connected to the outlets.
However, when the use of the electrical and electronic appliances is intended to stop, switches installed on the respective appliances are manipulated or a switch installed on a power bar is manipulated, thus integrally switching off the power of the appliances connected to the power bar. Alternatively, the plugs of the appliances are removed from the outlets or the power bar to stop the use of appliances.
In contrast, when electrical and electronic appliances are intended to be used, users achieve their objectives by conducting manipulation of the appliances in a procedure opposite to the above procedure.
However, when the electrical and electronic appliances are turned off by manipulating only the switches thereof or the switch of the power bar or when a user does not remove the plugs from the outlets or the power bar, there is a problem in that standby power is always supplied for the next use of the appliances in the case of some electrical and electronic appliances, thus wasting electrical energy. A method of removing plugs from outlets or a power bar is also problematic in that it causes user dissatisfaction because of the inconvenience of personally manipulating and removing the plugs.
Disclosure of the Invention
Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and an object of the present invention is to provide an automatic power switching circuit using light, which is installed in an outlet or a power bar for performing an intermediating function of supplying power to various electrical and electronic appliances, so as to improve user convenience, save electric energy and prevent the occurrence of fire when the electrical and electronic appliances are used indoors, so that, if indoor illumination is high, a current is allowed to flow through the outlet or power bar, while if the indoor illumination is low, a current flowing through the outlet or power bar is switched off, thus automatically switching off power without a user personally manipulating switches of the appliances or removing plugs thereof.
In order to accomplish the above object, the present invention provides an automatic power switching circuit using light, comprising an illuminance detecting unit for detecting illuminance according to the brightness of light, a comparing unit for comparing an output voltage obtained by an illumination detection signal output from the illumination detecting unit with a reference voltage, an amplifying unit for comparing the illumination detection signal input to a comparator of the comparing unit with the reference voltage to operate a relay and then generating a detection signal used to operate a gate of a thyristor device, a switching unit for controlling bidirectional currents of an input voltage and a supplied voltage, and a rectifying unit for converting an AC current input from a power supply into a DC current and supplying the DC current to the relay. Brief Description of the Drawings
FIG. 1 is a circuit diagram of an automatic power switching circuit using light according to the present invention.
Best Mode for Carrying Out the Invention
Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings.
FIG. 1 is a view showing the construction of an automatic power switching circuit using light according to the present invention. As shown in FIG. 1, the automatic power switching circuit includes an illuminance detecting unit 10, a comparing unit 20, an amplifying unit 30, a switching unit 40, a rectifying circuit unit 50, and electrical parts including diodes, condensers and resistors supporting the above-described components by allowing a current to flow only in a specific direction.
The illuminance detecting unit 10 includes a light receiving element and a resistor to detect illuminance according to the brightness of light.
The comparing unit 20 is constructed so that, if the brightness of light decreases to a predetermined illuminance or below, a comparator compares an input voltage and a preset reference voltage to each other and outputs a signal only when the input voltage is higher than the reference voltage. The reference voltage of the comparator is adjusted to be varied with resistance values.
If the signal output from the illuminance detecting unit 10 is input to the comparator, the amplifying unit 30 generates a signal according to the result obtained by comparing the signal output from the illuminance detecting unit 10 with the reference voltage and then supports the operation of the switching unit 40.
The switching unit 40 functions to control bidirectional currents of both an input voltage received from the illuminance detecting unit 10 through the amplifying unit 30, and a voltage supplied from a power supply, and is comprised of a triac, resistors and a diode bridge.
The rectifying circuit unit 50 rectifies an Alternating Current (AC) current using both a transformer and a diode bridge to convert the AC current into a Direct Current (DC) current because a current received from the power supply is the AC current, and uses the rectified current as power used to drive a relay.
The operation of the automatic power switching circuit using light according to the present invention having the above construction is described below. First, a case where the power of the automatic power switching circuit is switched off is described.
A current from the power supply is input to the rectifying circuit unit 50 comprised of a transformer TI and a diode bridge BG1, and then rectified from an AC current to a DC current. The DC current is used as operating power of a relay RYl through a resistor Rl and a condenser CI . At this time, a zener diode
ZD1 functions to prevent a reverse current from flowing into the rectifying circuit unit.
A part of the input current is input to a triac Ql and a resistor R4 connected in parallel with each other in the switching unit 40, passes through a diode bridge BG2, and is then output to a variable resistor NR1 through to a resistor Rl 1 and a gate of a thyristor device Q3. The gate of the thyristor device
Q3 is connected to a relay RYl to function to connect or disconnect the relay
RYl depending on the current variation of a light receiving element Cds of the illuminance detecting unit 10. The thyristor device Q3 uses characteristics that a current consistently flows only in the direction of the resistor R10 in the switching unit 40 unless a voltage of an anode of the thyristor device Q3 becomes
"0".
The current input through an input terminal, having passed through the thyristor device Q3 and the variable resistor VR1, is input to the comparing unit which obtains a voltage difference between two input signals so as to compare the input current with a current input from the light receiving element Cds of the illuminance detecting unit 10.
At this time, the variation of the current input from the light receiving element Cds is obtained when the brightness of light is highest, so that a resistance is lowest, and then a relatively large amount of current flows. In this way, since the current input from the power supply terminal is less than the current input from the illuminance detecting unit, the comparator U1B outputs the current input from the illuminance detecting unit to the amplifying unit 30 through a resistor R9 connected in parallel with a diode D2 and a condenser C3. The gate of the thyristor device Q3 is disconnected from the relay due to a current amplified by the amplifying unit including an operational amplifier U1A, so that the current from the power supply terminal, which has passed through a transistor Q2, the relay RYl and a zener diode ZD2 and switched through resistors R2 and R2, is prevented from being output to an output terminal, thus switching off the automatic power switching circuit using light.
On the other hand, if the automatic power switching circuit is switched on, a current input through the input terminal to the switching unit passes through the resistor Rl 1, the thyristor device Q3, the resistor R10 and the variable resistor VR1, and is then input to the comparing unit. At this time, a current input to the light receiving element of the illuminance detecting unit is relatively low, because the indoor illuminance is low, the brightness of light is lowest and the resistance becomes largest.
Therefore, since the current input from the illuminance detecting unit is less than the current input through the input terminal, the gate of the thyristor device Q3 and the relay RYl are connected to each other due to the current having passed through the amplifying unit, so that the current input from the switching unit flows into the relay RYl, thus enabling power to be supplied to the output terminal. Therefore, the power of an outlet or a power bar is switched on and thus electrical and electronic appliances can be used. Industrial Applicability
As described above, the present invention provides an automatic power switching circuit using light, which compares a current input through an input terminal with a current detected by an illuminance detecting unit, so that technology opposite to conventional technology of switching on power when the illuminance is low and switching off the power when the illuminance is high is implemented, thus enabling a user utilizing various electrical appliances indoors to save electricity for the appliances consuming power when the user does not manipulate a switch or even when the user manipulates the switch, and thus contributing the prevention of fires.

Claims

Claims
1. An automatic power switching circuit using light for automatically switching on or off power depending on a variation of indoor illuminance, comprising: an illuminance detecting unit (10) for detecting the indoor illuminance through a light receiving element; a comparing unit (20) for comparing a current output from the illuminance detecting unit (10) with a current input from a power supply terminal; an amplifying unit (30) for amplifying a current from the comparing unit (30); a switching unit (40) for selectively outputting one of a current input through an input terminal and a current input from the amplifying unit (30); and a rectifying circuit unit (50) comprised of a transformer and a diode bridge for rectifying an Alternating Current (AC) current input through the input terminal to a Direct Current (DC) current and providing power required for an operation of a relay functioning to switch on and off the circuit.
2. The automatic power switching circuit according to claim 1, wherein the illuminance detecting unit (10) includes the light receiving element, a resistor and the like.
3. The automatic power switching circuit according to claim 1, wherein the comparing unit (20) includes an operational amplifier, a resistor, a diode and the like.
4. The automatic power switching circuit according to claim 1, wherein the amplifying unit (30) includes an operational amplifier and a resistor, which are connected to each other, a transistor, and a zener diode.
5. The automatic power switching circuit according to claim 1, wherein the switching unit (40) includes a triac, at least one resistor and a diode bridge so as to switch bidirectional currents.
PCT/KR2003/002508 2002-11-21 2003-11-20 Auto switching circuit founded on illuminance WO2004047501A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2003282411A AU2003282411A1 (en) 2002-11-21 2003-11-20 Auto switching circuit founded on illuminance

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2002-0072634 2002-11-21
KR1020020072634A KR20040044586A (en) 2002-11-21 2002-11-21 Auto on/off circuit

Publications (1)

Publication Number Publication Date
WO2004047501A1 true WO2004047501A1 (en) 2004-06-03

Family

ID=32322274

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2003/002508 WO2004047501A1 (en) 2002-11-21 2003-11-20 Auto switching circuit founded on illuminance

Country Status (3)

Country Link
KR (1) KR20040044586A (en)
AU (1) AU2003282411A1 (en)
WO (1) WO2004047501A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100653098B1 (en) * 2005-04-21 2006-12-05 백명기 light and sound control apparatus for guest room of hotel and method thereof

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60189763A (en) * 1984-03-09 1985-09-27 Canon Inc Automatic switch opening and closing device
KR970078759A (en) * 1996-05-20 1997-12-12 최진호 Vending machine electronic fluorescent ballast
KR19980036984U (en) * 1996-12-17 1998-09-15 박병재 Parking light control device of car

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR890007023Y1 (en) * 1986-09-25 1989-10-14 이동진 Automatic on/off switching circuit
JPH0765615A (en) * 1993-08-26 1995-03-10 Matsushita Electric Works Ltd Security lamp device
US5459373A (en) * 1994-10-12 1995-10-17 Ham; Byung I. Mini-fluorescent lamp with automatic on/off
KR970007631U (en) * 1995-07-19 1997-02-21 Light-emitting device auto-flashing circuit according to light quantity
JPH11214174A (en) * 1998-01-27 1999-08-06 Matsushita Electric Works Ltd Automatic flickering device
JP2000133472A (en) * 1998-10-26 2000-05-12 Matsushita Electric Works Ltd Automatic switching on and off device for lighting pole
KR100372670B1 (en) * 2000-10-05 2003-02-19 양승학 An automatic energy-saving apparatus and a concent using sensor

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60189763A (en) * 1984-03-09 1985-09-27 Canon Inc Automatic switch opening and closing device
KR970078759A (en) * 1996-05-20 1997-12-12 최진호 Vending machine electronic fluorescent ballast
KR19980036984U (en) * 1996-12-17 1998-09-15 박병재 Parking light control device of car

Also Published As

Publication number Publication date
KR20040044586A (en) 2004-05-31
AU2003282411A1 (en) 2004-06-15

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